摘要
本文提出正交频分复用(OFDM)系统中基于码分复用(CDM)导频的上行链路的信道估计方法以减小导频序列间的干扰。在上行链路中,不同用户的导频的非正交性会极大地降低信道估计的性能,本文提出在信道估计中使用干扰删除来解决这一问题。仿真结果表明,我们的方法的性能与解相关方法相似,但复杂度更低。
In this paper, an improved channel estimation method based on code division multiplexing （CDM） pilot is proposed to mitigate interference among pilot sequences for orthogonal frequency division multiplexing （OFDM） systems in uplink. Interference cancellation is introduced into channel estimation to reduce interference in uplink due to non-orthogonality of pilot sequences for different users in this paper. Simulation results show that the proposed methods have much lower complexity and comparable performances with conventional decorrelation detector.
基金
国家"863"计划项目(2006AA01Z283)
关键词
通信技术
信道估计
干扰删除
OFDM
communication techniques
channel estimation
interference cancellation
OFDM
